About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Functional Nanomaterials: Functional Low-Dimensional (0D, 1D, 2D) Materials 2026
|
| Presentation Title |
Formation of High-Entropy Alloy Nanoparticles via Nanosecond Pulsed Laser–Induced Dewetting |
| Author(s) |
Vikas Reddy Paduri, Ritesh Sachan, Manuel Roldan Gutierrez, Nozomi Shirato |
| On-Site Speaker (Planned) |
Vikas Reddy Paduri |
| Abstract Scope |
High-entropy alloy (HEA) nanoparticles are emerging as a transformative class of nanomaterials, offering exceptional thermal stability, compositional tunability, and multifunctional performance. In this study, we reported the successful synthesis of PtPdNiRuAu HEA nanoparticles (NPs) via nanosecond pulsed laser-induced dewetting (NLiD) of multilayer thin films. Ultrafast melting and solidification (~100 ns) during NLiD enables homogeneous elemental mixing within each nanoparticle. By systematically varying the total film thickness (5–20 nm) and layer architecture, we elucidate a transition in dewetting mechanism that govern nanoparticle morphology and elemental distribution. A critical transition at ~10 nm total film thickness marks shift from spinodal-like bicontinuous structures (yielding finer NPs) to hole nucleation-driven dewetting (producing larger NPs). Thinner individual layers (1 nm) result in smaller, well-spaced particles while thicker layers (2 nm) produce larger NPs. The morphological and compositional control provide a robust experimental framework for tuning HEA NP properties with significant implications for catalytic applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Thin Films and Interfaces, Nanotechnology |